Regulations Governing Export of Commodities Article 19

An export permit shall be valid for thirty (30) days from the date of licensing. However, export permits with longer periods of validity may be issued for cases approved by the TITA for special projects.If the applicant feels that the export commodities cannot be exported within the period of validity, an application for an export permit with a longer period of validity may be made at the time of application by stating the reasons and attaching supporting documents.Applications are not accepted for extension of period of validity for an export permit. If a commodity is not exported within the valid period and re-licensing is applied for, an application for cancellation of the original export permit shall be made.
中文原文 貨品輸出管理辦法第19條
輸出許可證有效期限為自簽證之日起三十日。
但經貿易署核准專案輸出之案件,得核發有效期限較長之輸出許可證。
申請人預期輸出貨品不能於有效期限內輸出者,得於申請時敘明理由並檢附證件,申請核發有效期限較長之輸出許可證。
申請人不得申請輸出許可證延期;未能於有效期間內輸出貨品者,申請重簽時,應先申請註銷原輸出許可證。

English translation for reference only; the Chinese text prevails. Not legal advice.